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    <article id="post-数据结构与算法设计/小甲鱼/谈谈算法" class="article article-type-post" itemscope itemprop="blogPost">
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    <a href="/2019/06/26/数据结构与算法设计/小甲鱼/谈谈算法/" class="article-date">
  <time datetime="2019-06-26T10:50:19.000Z" itemprop="datePublished">2019-06-26</time>
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    <a class="article-category-link" href="/categories/数据结构与算法/">数据结构与算法</a>►<a class="article-category-link" href="/categories/数据结构与算法/小甲鱼/">小甲鱼</a>
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      <a class="article-title" href="/2019/06/26/数据结构与算法设计/小甲鱼/谈谈算法/">谈谈算法</a>
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        <!-- Table of Contents -->
        
        <pre class="mermaid">graph TB;
A(算法)-->B(输入)
A-->C(输出)
A-->D(有穷性)
A-->E(确定性)
A-->F(可行性)

B-->G(0个或n个输入)
C-->H(0个或n个输出)
D-->I(有限时间内完成)
E-->J(同样的输入会产生同样的结果)
F-->K(可以编程实现)</pre>







<pre class="mermaid">graph LR;
A(算法设计要求)==>B(正确性)
B-.-C(无语法错误)
B-.-D(合法输入能够产生符合要求的输出)
B-.-E(非法输入能够产生说明)
B-.-F(边界处理)
A==>G(可读性)
G-.-H(便于他人日后阅读和修改)
A==>I(健壮性)
I-.-J(输入数据不合法,能够做出妥善的处理,不是产生异常/崩溃/莫名其妙的结果)
A==>K(时间效率高)
A==>L(存储空间少)</pre>


      
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  <ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/健壮性/">健壮性</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/可行性/">可行性</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/可读性/">可读性</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/有穷性/">有穷性</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/正确性/">正确性</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/确定性/">确定性</a></li></ul>

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    <article id="post-数据结构与算法设计/小甲鱼/绪论" class="article article-type-post" itemscope itemprop="blogPost">
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    <a href="/2019/06/26/数据结构与算法设计/小甲鱼/绪论/" class="article-date">
  <time datetime="2019-06-26T10:14:57.000Z" itemprop="datePublished">2019-06-26</time>
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    <a class="article-category-link" href="/categories/数据结构与算法/">数据结构与算法</a>►<a class="article-category-link" href="/categories/数据结构与算法/小甲鱼/">小甲鱼</a>
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      <a class="article-title" href="/2019/06/26/数据结构与算法设计/小甲鱼/绪论/">绪论</a>
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        <h2 id="计算机解决问题"><a href="#计算机解决问题" class="headerlink" title="计算机解决问题"></a>计算机解决问题</h2><pre class="mermaid">graph TB;
A(建立数学模型)==>B(构造求解方法)
B==>D(设定存储结构)
D==>E(编写程序)
E==>F(测试)

H(分析问题的过程 抽象)-->I(描述问题的求解 方法)
I-->J(选择合理的存储结构)
J-->K(编写良好的程序)</pre>
<pre class="mermaid">graph LR;
B(数据结构)-->D(逻辑结构)
B-->E(物理结构)
D-->F(数据元素之间的关系)
E-->G(数据在计算机中的存储形式)
F-->|0v0|H(集合结构)
F-->|1v1|I(线性结构)
F-->|1vn|J(树形结构)
F-->|nvn|K(图形结构)
G-->L(顺序存储)
G-->M(链式存储)</pre>


      
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    <article id="post-English/Writer/Memo" class="article article-type-post" itemscope itemprop="blogPost">
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        <p>He sent out a memo expressing his disagreement with their decisions</p>
<p>This is further to your memo dated June 6 , in which you proposed that…..</p>
<p>Date: May 10</p>
<p>To : All Students</p>
<p>From : Li Ming</p>
<p>Subject: Recruiting Journalist for the Summer Semester</p>
<p>The student newspaper is currently looking for a journalist for the summer semester. Applicants should be studying at University , and  should preferably have at least two years’ writing experience.</p>
<p>The successful applicant will be expected to write two articles every week on happenings in the city or on campus. The position will commence at the end of May. If you are interested, please send your resume to the campus newspaper office right now.</p>

      
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    <article id="post-English/Writer/Letter" class="article article-type-post" itemscope itemprop="blogPost">
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  <time datetime="2019-06-25T14:37:08.000Z" itemprop="datePublished">2019-06-25</time>
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        <h2 id="Dear-Sir-Madam-Peter"><a href="#Dear-Sir-Madam-Peter" class="headerlink" title="Dear Sir / Madam  /Peter"></a>Dear Sir / Madam  /Peter</h2><center><h2>
    content ......
    </h2> </center>





<h2 style="text-align:right">yours faithfully /sincerely <br />
Li Ming</h2>



<p><strong>Yours faithfully</strong> 您忠诚的 ; 您忠实的 ; 你的忠诚的</p>
<p><strong>your sincerely</strong> 你的真诚 ; 您真诚 ; 你真诚</p>

      
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    <article id="post-English/Words/vigorious" class="article article-type-post" itemscope itemprop="blogPost">
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  <time datetime="2019-06-25T04:35:30.000Z" itemprop="datePublished">2019-06-25</time>
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    <a class="article-category-link" href="/categories/English/">English</a>►<a class="article-category-link" href="/categories/English/Words/">Words</a>
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      <a class="article-title" href="/2019/06/25/English/Words/vigorious/">vigorous</a>
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        <p>vigorous</p>
<p>Very vigorous exercise can increase the risk of heart attacks</p>
<p>verge</p>
<p>the country seemed to be on the verge of revolution</p>
<p>verify</p>
<p>verify the legal status of the people</p>
<p>vessel</p>
<p>Today’s vessels can find their prey using satellites and sonar</p>
<p>aircraft carrier / battleship / cruiser / destroyer / frigate</p>
<p>violent</p>
<p>violent song</p>
<p>victory / victim</p>
<p>virus </p>
<p>smallpox virus</p>
<p>vision</p>
<p>our vision of the future</p>
<p>virtue</p>
<p>a virtue that many Americans value highly</p>
<p>vocation</p>
<p>the confusion between educational and vocational reasons for bringing computers into schools</p>
<p>volume</p>
<p>a two-volume report</p>
<p>voluntary</p>
<p>Chinese Volunteers</p>
<p>vulnerable</p>
<p>Old people are particularly vulnerable members of our society</p>
<p>volcano</p>
<p>unlike most of the world’s vocanoes</p>

      
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  <ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/vessel/">vessel</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/virtue/">virtue</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/vision/">vision</a></li></ul>

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    <article id="post-English/Words/vanish" class="article article-type-post" itemscope itemprop="blogPost">
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  <time datetime="2019-06-25T04:24:15.000Z" itemprop="datePublished">2019-06-25</time>
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    <a class="article-category-link" href="/categories/English/">English</a>►<a class="article-category-link" href="/categories/English/Words/">Words</a>
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      <a class="article-title" href="/2019/06/25/English/Words/vanish/">vanish</a>
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        <p>vague</p>
<p>vague change</p>
<p>vanish </p>
<p>Some huge American industries ,such as consumer electronics , had shrunk or vanished in the face of foreign competition</p>
<p>variation</p>
<p>much of the variation is due to genes</p>
<p>vegetation (植物, 草木)</p>
<p>many square miles of ocean and vegetation</p>
<p>vehicle</p>
<p>the path of oncoming vehicle</p>
<p>venture</p>
<p>venture investment</p>
<p>verdict</p>
<p>guilty verdicts</p>
<p>versus</p>
<p>the problem of peace versus war</p>

      
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  <ul class="article-tag-list"><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/venture/">venture'</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/verdict/">verdict</a></li><li class="article-tag-list-item"><a class="article-tag-list-link" href="/tags/versus/">versus</a></li></ul>

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    <article id="post-English/Words/welfare" class="article article-type-post" itemscope itemprop="blogPost">
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  <time datetime="2019-06-25T04:15:10.000Z" itemprop="datePublished">2019-06-25</time>
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        <p>weird</p>
<p>Many things make people think artists are weird</p>
<p>welfare</p>
<p>the welfare of people</p>
<p>weary</p>
<p>the weary traveler</p>
<p>whereas </p>
<p>He must be about sixty , whereas his wife looks about thirty</p>
<p>wide </p>
<p>the subject of a nation-wide debate</p>

      
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    <article id="post-高等数学/极限与连续/N项和求极限" class="article article-type-post" itemscope itemprop="blogPost">
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    <a href="/2019/06/25/高等数学/极限与连续/N项和求极限/" class="article-date">
  <time datetime="2019-06-25T03:27:03.000Z" itemprop="datePublished">2019-06-25</time>
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        <h2 id="N项和求极限"><a href="#N项和求极限" class="headerlink" title="Ｎ项和求极限"></a>Ｎ项和求极限</h2><h3 id="例1"><a href="#例1" class="headerlink" title="例1　"></a>例1　</h3><script type="math/tex; mode=display">
\lim_{n \to \infty}(\frac{1}{\sqrt{n^2+1}}+\frac{1}{\sqrt{n^2+2}}+\cdots+\frac{1}{\sqrt{n^2+n}}) = ?</script><script type="math/tex; mode=display">
解: \lim_{n \to \infty} n(\frac{1}{\sqrt{n^2+n}})＜ 原式 < \lim_{n \to \infty} n(\frac{1}{\sqrt{n^2＋１}}) \\\\  
即　\lim_{n \to \infty} \frac{1}{\sqrt{1+\frac{1}{n}}}< 原式　＜　\lim_{n \to \infty} \frac{1}{\sqrt{1+\frac{1}{n^2}}} \\\\ 
\lim 左式  = 1, \quad \lim 右式 = 1 \\\\ 
由夹逼定理, 原式 = 1</script><h3 id="例2"><a href="#例2" class="headerlink" title="例2"></a>例2</h3><script type="math/tex; mode=display">
\lim_{n \to \infty}(\frac{1}NaN+\frac{2}NaN+\cdots+\frac{n}NaN) = ?</script><script type="math/tex; mode=display">
解: 令 b_n = \frac{1}NaN+\frac{2}NaN+\cdots+\frac{n}NaN
\\\\
设 a_n = \frac{n(n+1)}{2}(\frac{1}NaN) = \frac{1}{2} \\\\
c_n = \frac{n(n+1)}{2}(\frac{1}NaN) \\\\
=\frac{1}{2}(\frac{1+\frac{1}{n}}{1+\frac{1}{n^2}})\\\\
由夹逼定理 \lim b_n = 1/2</script><figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line">若分子次数齐,分母次数齐,且分母比分子次数多一次,用定积分,不能使用夹逼定理</span><br></pre></td></tr></table></figure>
<h3 id="例3"><a href="#例3" class="headerlink" title="例3"></a>例3</h3><script type="math/tex; mode=display">
\lim_{n \to \infty}(\frac{1}{n+1} + \frac{1}{n+2} + \cdots + \frac{1}{n+n})</script><script type="math/tex; mode=display">
ddd</script>
      
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    <article id="post-about/index" class="article article-type-post" itemscope itemprop="blogPost">
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        <ul>
<li>希望能写出流播放器</li>
<li><del>希望能把剩余的五科数学通过, 拿到文凭</del></li>
<li>希望写出好的博弈算法</li>
<li>最喜欢的人是郭雅</li>
</ul>

      
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  <time datetime="2019-06-23T18:20:52.000Z" itemprop="datePublished">2019-06-24</time>
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    <a class="article-category-link" href="/categories/English/">English</a>►<a class="article-category-link" href="/categories/English/Words/">Words</a>►<a class="article-category-link" href="/categories/English/Words/XYZ/">XYZ</a>
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      <a class="article-title" href="/2019/06/24/English/Words/wisdom/">wisdom</a>
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        <p>confort zone </p>
<figure class="highlight plain"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line">He has been working feverishly to put its widom on paper</span><br><span class="line">Self-doubt has yeild to blind pride</span><br></pre></td></tr></table></figure>
<p>fewer job opportunities for youth</p>
<p>Many of the Founding Fathers knew slavery are wrong - and yet most did little to fight it</p>
<p>permissive </p>
<p>adj. 许可的；自由的；宽容的；（两性关系）放纵的</p>
<p>Blaming the permissive 1960s is nothing new, but  this is not yet another criticism against the decline in education</p>
<p>He yelled with pain</p>
<p>The ship was wrecked on a reef</p>
<p>worthy of the sacrifices   , the worthy residents</p>
<p>the worth of any social institution</p>
<p>In dreams , a window opens into a world</p>
<p>recruiting players from all over the world</p>
<p>They worked until exhausted , lived with few protections and died young</p>
<p>connotation</p>
<ul>
<li>n. 内涵；含蓄；暗示，隐含意义；储蓄的东西（词、语等）</li>
</ul>
<p>the word amateur carry negative connotation</p>
<p>amateur</p>
<ul>
<li>n. 业余爱好者；生手，外行</li>
<li>adj. 业余爱好的；业余的；外行的；不熟练的</li>
</ul>
<p>witness 目击见证</p>
<p>The world is is going through the biggest wave of mergers and acquisitions ever witnessed.</p>
<p>withstand </p>
<p>withstand repeated strain</p>
<p>withdraw</p>
<p>withdraw money 取钱</p>
<p>TV industry had withdrawn to its domestic market 撤回</p>
<p>wit</p>
<p>great quickness of apprehension and wit</p>

      
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